Table 1. The PSD values of IMF's in δ (0.4-4Hz), θ1 (4-6Hz), θ2 (6-9Hz), α (9-14Hz), β1 (14-20Hz) and β2 (20-45Hz) bands.

Frequency Band	IMF	Wake	NREMS	REMS	F-value	p-value
δ-band(0.4Hz-4Hz)	IMF1	0.56±0.05	6.09±0.69	0.91±0.06	95.46	1.90E-14
	IMF2	0.71±0.10	12.25±1.26	1.01±0.12	129.19	2.22E-16
	IMF3	4.69±0.43	32.48±3.78	5.10±0.51	89.62	4.61E-14
	IMF4	16.77±1.38	49.99±5.52	13.82±1.05	73.48	6.99E-13
	IMF5	13.33±1.10	23.05±2.48	9.56±0.86	52.98	4.98E-11
θ1-band(4Hz-6Hz)	IMF1	0.37±0.03	5.51±0.54	0.61±0.04	139.60	1.11E-16
	IMF2	1.27±0.19	27.19±3.30	1.79±0.24	86.54	7.48E-14
	IMF3	7.99±0.89	52.82±5.06	9.24±0.82	154.25	0.00E+00
	IMF4	2.07±0.19	3.26±0.39	2.01±0.18
θ2-band(6Hz-9Hz)	IMF1	0.69±0.07	17.86±2.05	1.25±0.12	107.95	3.33E-15
	IMF2	3.84±0.52	91.67±10.29	5.87±0.82	111.26	2.11E-15
	IMF3	6.44±0.61	28.93±2.39	8.59±0.72	186.03	0.00E+00
α-band(9Hz-14Hz)	IMF1	1.77±0.25	65.81±8.31	3.40±0.36	88.01	5.92E-14
	IMF2	7.61±0.79	87.55±9.04	11.17±1.10	151.41	0.00E+00
β1-band(14Hz-20Hz)	IMF1	4.09±0.53	71.13±8.57	8.32±0.77	85.20	9.29E-14
	IMF2	5.01±0.42	16.73±0.17	6.64±0.54	54.18	3.76E-11
β2-band(20Hz-45Hz)	IMF1	28.70±8.28	63.87±18.43	43.36±12.51	33.21	1.25E-08

All values are in nV/Hz±S.E.M. Since the IMFs form a complete and orthogonal set, one-way ANOVA with state (Wake, NREMS and REMS) as a factor were performed. The corresponding F and p-values are also given.